Fuse device



J. P. MENTZER.

' FUSE DEVICE.

APPLICATION FILED APR. 19. 19

Patented Feb. 7, 1922-.

UNITED STATES JOHN P. MENTZEIQOF CHICAGO, ILLINOIS.

FUSE DEVICE.

Specification of Letters Patent.

Patented Feb. 7, 1922.

Application filed. April 19, 1917. Serial No. 163,170.

To all whom-it may concern:

Be it known that 1, JOHN P. Mnnrznn, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Fuse Devices, of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawings, forming a part of this specification.

My invention relates to fuse devices and especially to fuse devices having one or'more enclosed or embedded fuses, and to the process or Inethodof makingv same.

One object of the invention is to provide a simple, practical and efficient construction of fuse device.

A further object of the invention is to provide a practical and economical process for the manufacture of fuse devices of this kind. I

A further object of'the invention is to arrange for the easy manipulation of the fuse device when made with a pluralityof fuses so as to permit the several fuses to be brought into use one after the other.

A further object is to provide for the ready renewal of the fuse of fuses after use.

A. still further object is to insure the satisfactory operation of each of the fuses in a plurality fuse device without interfering with the others.

Further objects of the invention will be pointed out hereinafter.

In the accompanying drawing Fig. 1 is a longitudinal section of a fuse device embodying my present invention;

Fig. 2 is a plan view of the plug portion of the device;

Fig. 3 is a plan view of the separable base of said plug portion.

Fig. 4: is a perspective view partly broken away of a part of said plug portion.

The device shown in the drawings for carrying out the invention comprises plug and socket portions 1 and 2. The plug 1 is provided with a metallic shell 3 of tubular form which is secured to the base portion 4 of the plug, as by having one end embedded therein (Fig. 1). This shell 3 is preferably made of metal such as brass and is screw threaded so that it can be screwed 3. l/Vithin the shell 3 is the body portion or fuse holder 6 of the plug, said body portion or fuse holder being provided with one or more fuses, four fuses 7 being shown- The number of fuses 7 may be more or less than the four shown. These fuses 7 extend preferably from end to end of the body or holder 6 and when there are a plurality they are crossed at the outer end of the body or holder 6 and covered with a metallic cap piece 9 by which electrical connection is made with all of said fuses. The other ends 10 of said fuses 7 are terminated at the inner end of the body 6 so that contact maybe made with any one of them. The base portion 4: of the plug 1 is provided with a contact 11 (Fig. 3) which is capable of making electrical connection with one of the ends 10 of the fuses 7, namely, that end portion 10 which is adjacent to and in contact therewith.

The body or holder 6 is, however, adapted to be removed from the shell 3 and replaced therein, being fitted snugly. but at the same time removably within the shell 3. inner end of said body or holder 6 and the adjacent portion of the base 4: are furthermore provided with cooperating means by which the body 6 may be held against rotation, but which permit a relative rotary movement when desired, so as to allow the ends 10 of the fuses 7 to be brought into contact one after the other with the contact 11. As an advantageous arrangement, the base 4 is provided with recesses or sockets 12 of which there are preferably four, arranged equidistant from one illlOtllQlQilllCl the holder 6 is provided with corresponding projections 13 adapted to fit into the recesses 12. In this way when the holder 6 is inserted within the shell 3 to such an extent that the projections 13 fit into the recesses 12, the holder 6 will be held against rotation and one of the fuse ends 10 will be maintained in contact with the contact piece 11. When, however, that fuse blows or for some other reason it is desired to change fuses, the holder 6 may be moved outwardly in the shell 3 sufiiciently to withdraw the projections 13 from the recesses 12, whereupon the holder 6 may be turned a quarter turn and then pushed back so that the projections 13 will again enter the recesses 12, but this time with another fuse end 10 in contact with the contact 11, thereby including another fuse in circuit. This operation The may be repeated until all'four fuses are blown, after which a new body 6 with four fresh fuses is inserted."

Thesocket 2 is provided with a-suitable terminal 1d having a contact such as" the spring 15 by which acircuit wire may be connected Wltli said terminal. 14: and thenconnected in circuit with one of the fuses. The contact 11 on the base l is understood to be connected-by a suitable: wire or connection (not shown) by which said contact may be includedin said circuit. r w

'As a matter of further improvement, the' holder 6 and preferably the base a are made of some suitable insulating materlal, such for example as bakelite, which can be molded in the desired shapefand size. 7 This is particularly desirable because material of this kind can be sized very accurately, which is not true of porcelain anjdfmanyother kinds; of insulating material. F93 instance the holder 6 maybe. very accurately the precise size tofit perfectly in the shell 3, snugly enough to prevent accidental displacement, but loosely enough" to permit movement to. change fuses or bod lyremoval to substitute a new holder.

"In such case the fuse or fuses i n the holder 6 will be embeddec'l in the bakelite or other material when the same is'in a loose or powdered form and will. then be compressed 1n a heated condition to the desired shape and size. Similarly the: base 4 will be molded to 'the desired shapeand size with the end of the shell 3 embedded r It will .be. understood that changes and modifications may be made without depart ing from thespirit of the invention.

What I claim is: a

A fuse device comprising plug and socket members, whereof the plug member consists of a body portion and a base provided with a tubular member intowhich the body portion is fitted, said body portion being provided with longitudinally extending fuses, the ends of which project from the opposite ends of the body portion, said base being provided with a contact adapted to make contact with a projecting end of a fuse, and said body portion and base being relatively rotatable andprovided with interlocking devices for preventing 1 relative rotation, said rela- V tive rotation permitting said base contact to make contact with the ends of the different fusesione after-the other, and the interlocking devices. being arran ed to interlocksaid members to maintain the samelin; posit ons m which contact is made w th sa d 

